Final answer:
The primary purpose of traffic laws is to better enable highway users to predict the actions of other users.
Step-by-step explanation:
The primary purpose of traffic laws is C. Better enable highway users to predict the actions of other users.
Traffic laws are in place to promote safety on the roads by providing a set of rules and regulations that all drivers must follow. These laws help to create order and consistency on the roads, which enables drivers to predict and anticipate the actions of other drivers, reducing the risk of accidents and improving overall traffic flow.